%0 Journal Article %J Leadership Quarterly %D 2014 %T When Do Leaders Matter? Ownership, Governance and the Influence of CEOs on Firm Performance %A Clark,Jonathan R %A Murphy,Chad %A Singer,Sara %K Management %B Leadership Quarterly %V 25 %P 358-372 %8 2014 %G eng %N 2 %2 a %4 84307111936 %$ 84307111936